Tubular wall plug made from string or like material



Feb. 2Q, 4923. 1,446,432 J.- J. RAWLINGS TUBULAR WALL PLUG MADE FROM STRING OR LIKE MATERIAL Filed Aug. 22 1921 l vented new and useful Improvements Rel'atin a gritty, friable or easily crumbled maprovided wherein separate strings or the pointed or tapered at one end so that it Patented Feb, an, teas. y t p lAifiAH barren stares PATENT emea JOHN JOSEPH RAWLINGS, OF LONDON, ENGLAND, ASSIGNOR OF ONE-HALF TO THE RAWLPLUG COMPANY LIMITED, 0]? LONDON, ENGLAND, A CORPORATION OF GREAT BRITAIN.

TUBULAR WALL PLUG MADE FROM STRING OR LIKE MATERIAL.

Application filed August 22, 1921. Serial No. 494,422.

To all whom it may concern: ing it in a hole which is of about the same Be it known that 1, JOHN Josnrrr Rawdiameter as the exterior diameter of the LlNGS, a subject of the King of Great Britplug. Moreover, when the hole into which ain, residing at London, England, have ina close fitting plug is to be inserted is formed ing to Tubular \Vall Plugs Made from terial, such as soft brick, stone, concrete.

String or like Material, of which the followplaster and the like any loose material or ing is a specification. dust in the hole is swept or pushed to the It has heretofore been proposed to IIHLIHL bottom of the hole by the plug as it is in- 10 facture tubular wall plugs from strings, serted therein thus necessitating making the twines, or cords of suitable fibres, grouped hole of extra depth to accommodate such side by side longitudinally and held together debris. by an adhesive, and apparatus for the manu- In order to mitigate these disadvantages,

fact-ure of such tubular wall plugs has been according to this invention, the plug. is

like drawn from a spool holding creel, are can be more readily inserted in the hole by gathered together side by side, passed introducing this pointed or tapered end first. through a tank in which the strings are The plugs maybe pointed by means of coated with an adhesive, then passed through automatically operating machinery in which,

20a die plate in combination with which a for example, the plugs are passed from a mandrel is provided in order to form the hopper into a hollow rotating lathe spindle coated strings into a tubular bundle, and this along which they are propelled intermitbundle, after being dried and compressed, is tently, each plug as it is brought to a posi- 7,0 finally divided into separate plugs by a suittion in which it protrudesfrom the spindle 25 able cutting device. being gripped temporarily by a chuck by The tubular wall plugs thus produced are which it is held and rotated whilst the end useful for enabling screws, nails and other of the plug is operated uponby a suitable fastening means to be secured in plaster, knife tool, milling cutter or the like to form marble and other materials, the plugs being a tapered or pointed end to the plug, after 30 first inserted in holes formed for this purwhich the plug is released by and ejected pose in the plaster or like material, and then from the chuck. Machinery suitable for the the screw or nail is driven into the boreof purpose is in general well known and it is the plug, whereby the fibres of thoplug are not essential to employ any particular type pressed against the wall of the surrounding of machine. For example, the plugs maybe 35 hole in the plaster or like material and the pointed equally well by feeding them on to a plug is thus held firmly in this hole whilst rotating wheel by which they are caused to the bore of the fibrous plug afiords a better roll on a surface concentric with the wheel grip for the screw or nail than would be and whilst being so rotated the ends of the obtained by driving the said screw or nail plugs may be carried round and operated 40 directly into plaster or like hard granular upon by a milling cutter or like rotary tool material. to point their ends.

The tubular wall plugs produced by the In the accompanyingdrawing, Figure 1 method of manufacture hereinabove referred shows a cylindrical plug a with flat ends 7). to, are substantially cylindrical of uniform Figure 2 shows the improved plug 0 formed 45 diameter from end to end and have flat ends. with one pointed end 01. These plugs are Now it has been found in the use of such a composed of a number of strings e or the plug that there is some difficulty in insertlike laid side by side longitudinally as shown in end VlBW in Figure 3, secured together an adhesive uniting together adjacent by an adhesive and compressed. to a tubular strings, the said plug havmg a diminish- 10 form. ing tapered exterior surface at one of its Vhat I claim is ends. A tubular Wall plug comprising "a, plural- JOHN JOSEPH RAWLINGS. .ity of strings extending side by side longi- Witnesses: v tudinally of the plug to form a substantially GEO. HARRISON,

eylindi'ica l exterior surface, and layers of H. P. MURPHY. 

